Process of polishing.



UNITED STATES PATENT OFFICE.

ALBERT GIESE, OF SCHWERIN, GERMANY, ASSIGNOR TO THE FIRM OF GEBR. PERZINA, OF SOHWERIN, GERMANY.

PROCESS OF POLISHING.

Specification of Letters Patent.

Patented May 26, 1908.

Application filed January 3, 1907. Serial No. 350,611.

To all whom it may concern:

Be it known that I, ALBERT GIEsE, foreman, a subject of the King of Prussia, residin at Nos. 45-47 Wismarschestrasse, Sc werin, in the Grand Duchy of Mechlenburg-Schwerin, German Empire, have invented new and useful Improvements in Processes of Polishing Pianos, Furniture, and the Like, of which the following is a specification.

My invention relates to an improved process for polishing pianos, furniture and the like, whereby I am enabled to do in a single operation that which has hitherto only been possible in two separate stages, namely the preliminary operation of stopping the pores and the subsequent polishing operation.

By the use of my new process I attain the essential advantage that the time necessary for polishing can be considerably reduced.

According to my process I use in combina- 'tion with a new polishing agent different liquids or mixtures according to the steps of the process.

The new' polishing agent is a powder of substantially the following composition:

350 grams resin (colophony),

The said polishing agent may be prepared by first finely pulverizing each in redient singly, and in then thoroughly mingiing the various ingredients in desirable order by means of suitable mixing devices.

The new polishing process is carried out in the following manner: By means of a rubber, such as pollshing ball or rag, saturated in spirit, the cleaned plain or veneered wood is polished, after being springled over with a small quantity of the dry polishing agent. After the preparation has been thoroughly rubbed in, the procedure is repeated in the same manner two or three times, depending upon the nature of the wood in question. It is not necessary to make pauses when imparting this ground polish, as the first o eration is sufficient to produce a fixed, l iard, binding coating on the wooden surface, thoroughly united with the wood. The first or ground polish is now finished and a hard, firm, glassy surface produced.

Between the finished ground polish and the commencement of the final polish or finish, it is well, but by no means essential, to allow the ground-polished surfaces to stand a day. The final polishing is done in the following manner: In view of the hardness and permanence of the ground olish, it is only necessary now to produce by the final polish a high finish. For this purpose instead of pure spirit being used for the polishing ball or rag, as was the case with the ground polish, weak furniture polish (shellac dissolved in spirit) is employed and the polishing ball so saturated strewn over with the new pulverulent polishing agent. If, in particular cases, it is desired to give still a second, extra polish (high superpolish), the polishing ball, instead of being moistened with weak furniture polish the second time, should be moistened as for the first polishing operation with pure spirit and then strewn over with the new polishing agent.

Bythe application of the new polishing agent the polishing process, as already remarked, will be very considerably shortened and simplified.

Experiments have further shown that the polishing process can be still further considerably shortened, if, in conjunction with the new polishing agent, both for the ground polish and the filial polish (finish), and also for the subsequent extra high polish (if imparted), a polishing liquid is used, consisting each time of spirit, copal and gum-sandarac in suitable proportions.

The three polishing liquids are composed of the following:

17.5 grams copal,

7.5 gum-sandarac.

When these three liquid polishes are employed, the polishing of pianos, furniture, and the like is carried out as follows: The ground polish is imparted in the same manner as before, exceptthat the polishing ball is saturated with the first liquid polish above mentioned, instead of with pure spirit. In

giving the final polish the procedure is likewise the same as at first described, but the polishing ball is saturated with the second said liquid polish instead of with weak furniture polish. If an additional high superpolish is to be imparted, the procedure is again the same as before described, with the difference that the polishing ball is moistened with the third said liquid polish instead of with pure spirit.

Having thus described my invention, what I claim as new is l. The process of simultaneously stopping the pores of, and polishing, pianos, furniture, and the like, consisting in giving a ground polish by strewing a powder composed of resin, prepared chalk, barytes, pulverized oyster shells and zinc white, upon the surface to be treated, and applying frictionally thereto a rubber saturated with spirit, without shellac; and in imparting a final polish by again frictionally applying a rubber, saturated with a weak furniture polish and sprinkled with the said powder; substantially as described.

2. The process of simultaneously stopping the pores of, and polishing, pianos, furniture, and the like, consisting in giving a ground polish by strewing a powder composed of resin, prepared chalk, barytes, pulverized oyster shells and zinc white upon the surface to be treated, and applying frictionally thereto a rubber saturated with spirit without shellac; in imparting a final polish by again frictionally applying a rubber, saturated with a weak furniture polish and sprinkled with the said powder; and in bestowing an extra high polish by the frictional application of a rubber moistened with pure spirit, as at first, and sprinkled with the said powder; substantially as described.

3. The process of simultaneously stopping the pores of, and polishing, pianos, furniture, and the like, consisting in giving a ground polish by strewing a powder composed of resin, prepared chalk, barytes, pulverized oyster shells and zinc white upon the surface to be treated, and applying frictionally thereto a rubber, saturated with a mixture of spirit, copal and gum-sandarac; and in imparting a final polish by again frictionally applying a rubber, saturated with a second mixture of spirit, copal and gum-sandarac, and sprinkled with the said powder; substantially as described.

4:. The process of simultaneously stopping the pores of, and polishing, pianos, furniture, and the like, consisting in giving a ground polish by strewing a powder composed of resin, prepared chalk, barytes, pulverized oyster shells and zinc white upon the surface to be treated, and applying frictionally thereto a rubber saturated with a mixture of spirit, copal and gum-sandarac; in imparting a final polish by again frictionally applying a rubber, saturated with a second mixture of spirit, copal and gum-sandarac, and sprinkled with the said powder; and in bestowing an extra high polish by the frictional application of a rubber moistened with a third mixture of spirit, copal and gu1n-san darac and sprinkled with the said powder; substantially as described.

5. In a process of simultaneously stopping the pores of and polishing, pianos, furniture and the like, the combined use, in the steps or phases of ground polish, final polish and high superpolish, of a powder composed of resin, prepared chalk, barytes, pulverized oyster shells and zinc white, and of a mixture of spirit, copal and gum-sandarac, the proportions of said mixture varying accord ing to the different steps or phases of the I process, substantially as set forth.

In witness whereof I have hereunto signed my name, Berlin, this twentieth day of December 1906, in the presence of two subscribing witnesses.

ALBERT GIESE. Witnesses WVOLDEMAR I-IAUPT. HENRY HAsPER. 

